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Niemann, Helge; Fischer, David; Graffe, Dorothea; Knittel, Katrin; Montiel, Américo; Heilmayer, Olaf; Nöthen, Kerstin; Pape, Thomas; Kasten, Sabine; Bohrmann, Gerhard; Boetius, Antje; Gutt, Julian
First videographic indication of an Antarctic cold seep ecosystem was recently obtained from the collapsed Larsen B ice shelf, western Weddell Sea (Domack et al., 2005). Within the framework of the R/V Polarstern expedition ANTXXIII-8, we revisited this area for geochemical, microbiological and further videographical examinations. During two dives with ROV Cherokee (MARUM, Bremen), several bivalve shell agglomerations of the seep-associated, chemosynthetic clam Calyptogena sp. were found in the trough of the Crane and Evans glacier. The absence of living clam specimens indicates that the flux of sulphide and hence the seepage activity is diminished at present. This impression was...

Niemann, Helge; Fischer, David; Graffe, Dorothea; Knittel, Katrin; Montiel, Américo; Heilmayer, Olaf; Nöthen, Kerstin; Pape, Thomas; Kasten, Sabine; Bohrmann, Gerhard; Boetius, Antje; Gutt, Julian
First videographic indication of an Antarctic cold seep ecosystem was recently obtained from the collapsed Larsen B ice shelf, western Weddell Sea (Domack et al., 2005). Within the framework of the R/V Polarstern expedition ANTXXIII-8, we revisited this area for geochemical, microbiological and further videographical examinations. During two dives with ROV Cherokee (MARUM, Bremen), several bivalve shell agglomerations of the seep-associated, chemosynthetic clam Calyptogena sp. were found in the trough of the Crane and Evans glacier. The absence of living clam specimens indicates that the flux of sulphide and hence the seepage activity is diminished at present. This impression was...